7.1 Introduction7.2 Carbon-Allotropes: Synthesis Methods, Applications and Future Perspectives7.3 Reaffirmations of Heavy Metal Contaminations in Water and Their Toxic Effects7.4 Technology is Used to Treat Heavy Ions of Metal7.5 Factors Influencing How Heavy Metal Ions Adhere to CNTs7.6 ConclusionsAcknowledgmentsReferences